Call transmitter device



Nov. 16, 1937. J. c. ROBERTS ET AL CALL TRANSMITTER DEVICE Filed June 20, 1936 7 Sheets-Sheet 1 FIG.

' JGROBERTS ./NVE/VT0R$.cD.R/CHARD BY J %4 ATTORNEY Nov. 16, 1937. J. G. ROBERTS ET AL CALL TRANSMITTER DEVICE Filed June 20, 1936 7 Sheets-Sheet 2 .J. a. ROBERTS ic. 0. RICHARD j @[mz MM ATTORNEY Nov. 16, 1937.

.1. G. ROBERTSET AL 2,099,143

CALL TRANSMITTER DEVICE Filed June 20, 1936 7 Sheets-Sheet 3 FIG. 3

.J. a. ROBERTS WWW/*5 'c. 0. R/CHARD A TTORNEV Nov. 16, 1937. J. G. ROBERTS ET AL CALL TRANSMITTER DEVI CE Filed June 20, 1936 7 Sheets-Sheet 4 v at A TTORNEV \S 3 3 mm 3 w .JGROBERTS lNVf/VTORS-C 0 By K j 141c AM 1937. J. G. ROBERTS ET AL 2,099,143

CALL TRANSMITTER DEVICE Filed June 20, 1936 7 Sheets-Sheet 5 I lumm .JGROBERTS 'QQR/CHARD.

4 T TORNE V CALL TRANSMITTER DEVICE Filed June 20, 1936 7 Sheets-Sheet 6 J. a. ROBERTS WVENTORS'CQR/CHARD 83% fiacivxall ATTORNEY 1937. J. G. ROBERTS ET AL 2,099,143

CALL TRANSMITTER DEVICE Filed June 20, i936 7 Sheets-Sheet 7 FIG. 7

. J. a. ROBERTS WVENTORS' c. 0. RICHARD :9. 7%! %mzld A TTORNEV Patented Nov. 16, 1937 CALL TRANSMITTER DEVICE John G. Roberts, Dobbs Ferry, and Charles 1). Richard, West New Brighton, N.'-Y., assignors to Bell Telephone Laboratories, Incorporated, New York, N. Y., a corporation of NewYork Application June 20, 1936, Serial No. 86,284

32 Claims. (01. 179-90) This invention relates to call transmitter devices of the type used in automatic telephone systems and the like.

Heretofore when an operator had set up a call by the operation of an ordinary call transmitter for transmitting a certain call designation and had failed to get a response or found the called line busy, it was necessary to operate the call transmitter a second time by operating the impulse defining member a number of times corresponding to the number of digits comprised in the call designation desired, which in large areas necessitates as many as seven operations of the element with the consequent loss of time since it was necessary to wait until the operating element had returned to normal after each digit transmitting operation.

In certain types of call transmitter devices slidable camming bars are used which when moved for positioning numerals carried thereby in registry with respective indices, set a call designation to be transmitted by the operation of a pulsing mechanism operating according to the adjusted positions of such bars. In the setting of a call designation by the use of such devices, however, some time is lost, first, in the selection of. the bars and, second, in the selection of the particular digits on such bars. Moreover, in such .devices it is not possible to start the pulsing mechanism immediately after the positioning of the first camming bar which necessitates the positioning of all the bars prior to the starting operation of the pulsing mechanism, which also entails considerable loss of'time in the transmitting of telephone call designations. Moreover, such devices have been found too costly to manufacture especially in the forming of the camming bars due to the accuracy required in the operation of the pulsing mechanism.

The object of the invention is to provide an improved call transmitter which will simplify call transmitting operations, which will be simple and which will operate in a positive manner.

In accordance with the present invention a call transmitter is provided in which the simple operation of digit key members corresponding'to a desired call designation is effective to control the operations of impulse driving mechanisms fortransmitting such designations and thereby causing the operation of automatic switches for selecting the desired line.

More specifically, the operation of the digit key members is efiective to set stopping members in position for determining the operation oi a pluraHty of motor elements operatlvely condesignation.

' A manually operable handle member is provided for actuating a resetting mechanism whereby the motor elements in the form of springactuated ratchet mechanisms and the stopping elements are returned to their normal unoperated position collectively after each call transmitting operation, while the operation of other auxiliary key members actuates a gearshift mechanism whereby the operation of the handle member is rendered ineffective with respect to the stopping elements set by the operation of the key members. thus permitting the repeating of the sending of any call designation any desired number of times by a simple operation of the handle member without resetting the digit keys forthe repeating of such a call designation.

The stopping members, which are in the form of pins, are slidably mounted in an arcuate support or bank. These stopping members are dis-' posed in coordinate rows, there being in the present device seven stopping members in each vertical row and ten stopping members in each horizontal or coordinate row. I The stopping members in each horizontal row are spaced at an equal distance apart and their angular relation with respect to the movement of the motor elements determines the operation of these elements and that of the pulsing mechanism actuated thereby. Means actuated by the operation of the key members, and cooperating with automatically operating means, is provided for controlling the successive operation of the motor elements upon the starting of the first motor element by the operation of one of the auxiliary key members.

An arcuate bar is provided for mounting ten plunger members each of which is associated with a vertical row of stopping members. This bar is, in turn, mounted on guiding rods and is moved by a ratchet mechanism under control of the key members for successively positioning these plungers in operative relation with the stopping members in each horizontal row, there being a bar operatively connected to each key for selectively actuating these plungers in any position along the vertical rows of stopping members, with means provided for holding the'mounting bar and the plunger members carried thereby in each advanced position, means being provided for resetting the mounting bar and the plunger members to normal unoperatedposition upon the operation of the handle member preparatory to any subsequent operation of the transmitter.

Other novel features and advantages of the invention will appear from the following description and by the claims appended thereto, ref-' erence being had in the accompanying drawings in which:

Fig. 1 is a perspective view of the call transmitter of the invention;

Fig. 2 is a left side assembly view showing the housing in section;

Fig. 3 is a top assembly view showing the housing in section taken approximately on line 3--3 of Fig. v

Fig. 4 is a cross-sectional view taken on lines 4-4 of Fig. 5;

Fig. 5 is a front assembly view shown with a number of operating parts in section;

Fig. 6 is a cross-sectional view taken approximately on line 66 of Fig. 5;

Fig. '7 is a cross-sectional view taken on line 7-1 of Fig. 5;

Figs. 8 and 9 are partial views of the plungers operating mechanism, the supporting bar being shown in section;

' Fig. 10 is a partial view of the impulse shaft driving mechanisms shown in perspective;

Fig. 11 is a partial view of a supporting arm shown with its bearing portion in section taken on line H-H of Fig. 4;

Fig. 12 is a partial top view-of the cam shafts and the'yoke actuated thereby in normal position;

Figs. 13, 14 and 15 are views of the cam shafts in successive operated positions; and

Fig. 16 is a partial view of the impulse cam driving mechanism shown in perspective.

In the drawings 9 indicates a base which is provided with a. peripheral shoulder portion shown in Figs. 2, 4 and 5 for receiving a housing It. The base 9 is formed with upright portions II and I2, Figs. 5 and '7, for mounting a shaft l3 and on this shaft is pivotally mounted a set' of ten key members, Kl, K2, K3, K4, K5, K6, K7, K8, K9, and Kit), having buttons provided with code numbers representing c'all designations as shown in Figs. 1, 3, 6 and 7. The other ends of these key members are operatively connected as by links Ll, L2,L3, L4, L5, L6, L1, L8, L9,

and LN], to a corresponding number of similar yoke members l4 shown in Figs. 4 and '7, which are pivoted on upright lug portions l5 disposed in an arcuated row and formed integrally with the base 9. The other ends of .yoke members l4 are operatively connected to a corresponding number of vertically disposed bars Bl, B2, B3, B4, B5, B8, B1, B8, B9, and Bill, through similar links l8. The bars Bl, B2, etc. are in turn pivoted at both ends to similar link members 76 and II, the links l6 being pivoted on supports.

l9 formed with the base 9, and link members 47 pivoted on downward extending lugs' 20 formed with a supporting plate 2| shown in Figs. 2, 3, 4, and 5.

The supporting plate 2| is held in spaced relation with respect to the base 9 by post members 22, 23, and 24, shown in Figs. 2, 3, 4, 5, 6

and '7, and secured thereto by screws 25, 26 and 2'7. The key members Kl, K2, K3, etc., and the bars BI, B2, B3, etc. connected thereto are held in normal unoperated position as shown in Figs. 2, 4, 5 and '7 by similar spring members SM formed from a spring metal strip X secured to base 9 by a number of screws XI. The base 9 and the plate 2| are provided with registering holes for receiving the ends of guiding" members in the form of long screws 28, 29 and Y30, shown in Figs. 2, 3, 4 and 6, and on these guiding members is slidably mounted anarcuated oar 3| shown in Figs. 2, 4, 5, 6, 8 and 9 normally resting on the top ends of bushings bs, bs2 and M3 shown in Fig.' 7, the arcuated bar 3| being provided with ten equally spaced and slidable plunger members Pl, P2, P3, P4, "P5, P6, P1, P8, P9 and PH), best seen in Fig. 6 which are held in unoperated position by coiled springs such as 32 shown. These plunger members are radially disposed in the bar 3| for registering at one of their ends with the vertically disposed bars BI, B2, B3, B4, B5, B6, B1,,B8, B9 and BIG with which they are operatively associated and their.

other ends with the ordinate rows SI, S2, S3, S4, S5, S6, S7, S8, S9 and SH! of coordinately disposed stopping members slidably mounted in an arcuated bank 33 and held frictionally in position therein by'a pad PD of fibrous material such as felt, this bank being secured at its lower end on a bar or plate 34 carried by the base 9 and securely held thereon by a number of screws 35, shown in Figs; 4, 6 and '7, and at its upper end to the supporting plate 2! by a screw 36, shown in Fig. 4, there being ten stopping members in each coordinate row and seven stopping mem bers in each ordinate row.

According to. the mechanism above described, a downward movement'imparted to any one of the key members as key K5, for example against the tension of its retracting spring SM is transmitted to its connecting bar B5 through the link L5 (Figs. 4, '7) connecting with its yoke l4 and the I adjustable link I8 connected to the bar B5. The arcuated downward movement of this bar due to its connections with the links 75 and I1 causes this bar to engage its asso- I ciated plunger P5 for moving it in the bar 3| against the resistance of its retractile spring 32, the axial movement of plunger P5 being effective to move the stopping member S5 of the lower disposed coordinate row in a. radial direction in the path of pivoted arms Al and A2 shown in Figs. 2, 4, 5, 6, 10 and .16 for a purpose that will be hereinafter described in detail. It is to be noted, however, that the plunger P5 is retracted to normal position by spring 32 upon the release of key K5, which in turn is returned to normal by its respective associated spring SM.

The movement of any one of the keys Kl, K2, etc., as the key K5 above mentioned, imparts, a downward movement to.a cross-bar 31 shown in Figs. 2, 4, 5, and '7 pivoted on shaft l3 and thereby a pivotal movement to a lever 38 also pivoted on shaft l3 and secured at one end to the bar 37 by a screw 39. The other end of lever 38 is operatively connected as by yoke member Zl and links 4| and MY to a ratchet toothed rack member 40, shown in Figs. 4, 6, 7 and 8, slidably mounted in guiding members 42 and 43 laterally extending from the bank 33. Another ratchet toothed rack 44, shownin Figs. 6 and 9 is securely mounted on the bank 33 adjacent the movable rack 40. The rack 40 is engaged by a pawl 45 under the tension of a spring 48, while the rack 44 is engaged by a pawl 41 under the tension of a spring 46, so that the upward movement of rack 40 through the return movement of one of the keys KI, K2, etc., K5 by this example and the return movement of bar 31 under the tension of its associated spring SM is eiiective to move the arcuated bar 3| one step up for positioning the plungers PI, P2, P3, etc. carried thereby with the second coordinate row of stopping members SI, S2, S3,

etc., where the pawl 41 engages the second tooth T2 of the stationary rack 44 for holding the bar 3| and the plunger members PI, P2, P3, etc. carried thereby in coaxial and operative relation with the second coordinate row of stopping members SI, S2, etc., there being provided as above mentioned seven horizontal or coordinate rows of ten stopping members SI, S2, etc., the first vertical or ordinate row of stopping members SI representing digit 1, the row S2, digit 2, the row S3, digit 3, the row S4, digit 4, etc. the vertical row SIIJ representing digit which as well known in the automatic telephone art is equivalent to ten pulses.

The operation of the bar 3| as above described is repeated for each key. KI, K2, etc. operated up to the tooth T1 at the upper end of the racks 40 and 44, thus successively positioning in seven steps each plunger member PI, P2, P3, etc. in axial alignment with a stopping member SI, S2, S3, etc. included in each ordinate or vertical row.

The slidable pawls 45 and 41 shown in Figs. 6, 8 and 9 are provided at their other ends with toothed portions 49 and 50 engaging the toothed portions formed in pivoted rods and 52. These rods are provided at their lower ends with abutting arms AXI and AX2 shown in Figs. 6 and '7 so that a pivotal movement of bar 5| in a counter-clockwise direction will impart a pivotal movement to the rod 52 in a clockwise direction for disengaging the pawls 45 and 41 from their respectively associated rack members 40 and 44, thereby permitting the arcuated bar 3| and the plunger members PI, P2, P3, etc. carried thereby to return as by gravity to normal starting position, shown in Figs. 2, 4, 5, 8 and 9, the pivotal movement of rod 5| being effected through the engagement of arm AX3 at the upper disposed end of rod 5| with a pivoted camming plate I46 shown in Figs. 2, 3, 4 and 5 in a manner that will be hereinafter described in detail. 1

With each coordinate row of stopping members SI, S2, S3, etc. in the bank 33 is associated a pair of radial arms AI and A2 shown in Figs. 2, 4, 5, 6, and 16. The arm AI of each pair is formed with a hub portion 55 best seen in Figs. 4, 6 and 10 loosely fitted in the bearing portions of supporting arms 56, 56 etc. and the lever arms A2 are loosely fitted over bearing portions formed with the supporting arms 56' etc. adjacent the underside of arms Al. The arms AI and A2 and the bearing portions of supporting arms 56' etc. are slotted radially for permitting, when placed in registry as shown in Fig. 10, the passing of a shaft 51 therein for positioning it concentric to the hubs 55 of arms AI as shown in Figs. 4, 5, 6 and 10. An arm such as 56' etc. above mentioned is provided for independently supporting each pair of lever arms AI and A2 and these supporting arms are formed integrally with an upright bar 58, in turn formed with a plate I34, this plate being held securely on lugs II and I2 of the base III by a number of screws 64. The arms AI and A2 of each pair are movable relative to each other and are normally held in angular spaced relation by springs 53 having one of their ends secured to respective pawl 54, 54 54 54 etc. pivoted on the arms AI and the other ends of thesev springs engage slots in the upward bent portions of arms A2, the springs 53 normally holding the pawls 54, 54 54 etc. in engaged relation with associated ratchet wheels RI, R2, R3, R4, R5, R6, and R1 carried by the shaft 51.

The pairs of arms AI and A2 and the shaft 51 are rotated through the tension of spiral springs 59', 59 59 59 59 58 and 59", each having one of its ends hooked to the hub 55 of its other end to its respectively associated arm Al.

Arms AI and A2 of each pair are held in normal unoperated position against the tension of their respective spiral spring 59, 59 ,59 59 59 '58 and 59" by yoke members YI, Y2, Y3, Y4, Y5,

Y6 and Y1 having one of their end portions normally engaging with the ends of arms AI as shown in Figs. 5 and 6. Arm members YI, Y2, Y3, etc. are pivotally mounted on an inverted U- shaped frame 6| secured at its lower end to the plate or bar 34 by screws 62 and 63, the successive release of the arms AI and A2 of each pair of arms YI, Y2, Y3, etc. being effected by camming mechanisms which will be hereinafter described in detail.

The shaft 51 at its lower end passes through the plate 34 and rests in a vertical position on a steel ball 12 in a bearing portion 65, shown in Figs. 4 and 7 formed with the base ID. The upper end of shaft 51 is journaled in a bearing portion formed at the end of a shoulder screw 66 shown inFigs. 34 and 5 engaging the supporting plate 2| and on the periphery of the bearing portion of this screw is rotatably mounted a bushing 61 shown in sectional view in Fig. 4, serving for securely mounting an angle gear 68 and an arm 69 formed with an enlarged portion at its free end as shown in Figs. 3, 5 and 16, provided for securing the upper end of a bar I0, formed with an arm 10A pivoted on the bearing portion 'II of a bushing formed with the plate 34 shown in sectional view in Fig. 4, the bar III in its movement in the direction indicated by the arrows in Figs. 3, 5, 6 and 16 being efiective to engage the lugs I6, I6 I6 I6 16 I6", and 16', of the arms Al for returning these arms and thereby the arms A2 to normally unoperated position upon the operation of a manually operable member I5 shown in Figs. 1, 2, 3 and 5, in a manner that will be hereinafter described in detail.

The gear 68 operatively engages an angle gear sector 11 keyed on a shaft 18 journaled in bearing portions 19 and 80 formed with the supporting plate 2|. One end of shaft 18 is formed with a cam portion 206 disposed in operative relation with a ratchet pawl 203, as shown in Figs. 3 and 5, provided for a purpose that will be hereinafter described in detail. On the opposite shaft 18 is keyed a spur gear 8|, operativeiy engaging a gear sector 82, this sector being mounted on a pivot 83 journaledat both ends in a forkedshaped support 84 downwardly extending from the plate 2|, and a pin 85 in support 84 engages a slot 86 in gear sector 82 for limiting its movements as imparted by the handle lever I5 against the resistance of a retracting spring 88 having one end hooked to the gear 8| and its other end in the supporting lug 80 carried by plate 2|, handle lever I5 being secured to gear sector 82 by a screw 81 shown in Figs. 2, 3 and 5.

On bushing 61 at the top portion of shaft 51 is loosely mounted a gear sector 90 shown in Figs. 2, 3, 4 and 5 having an arm portion 9|, provided with an enlarged portion at its free end to which is secured as by ordinary screws a vertically disposed bar 92 formed at its lower end portion with an arm 93 shown in Figs. 2, 5 and 6 pivoted on the bearing portion 94 of the bushing formed with the plate 34. The bar 92 is formed with six perpendicularly extending arcuated arms ARI, AR2, AR3,AR4, AR5 and ARB, each having ten ratchet teeth disposed in engageablc relation with respectively associated pawl 95 formed integrally withthe pawls 541 54 54 54 54 and 54 The engagement of pawl portions 95 of pawls 54', 54 etc. with the teeth of their respective arms or sectors ARI, AR2, etc. is effected upon a movement of the arms AI relative to arms A2 when the movement of arms A2 under tensionof their motor springs 59', 59 59 59 59 and 59 is arrested by the stopping members SI, S2, S3, etc., according to the key KI, K2, K3, etc. depressed and the consequent flexing of spring 53 connecting the arms AI and A2 of each pair, the engagement of pawl portions 95 with ratchet arms ARI, AR2, etc. being effective to impart an angular movement to the arm 93 and the cam toothed sectors 96 formed therewith corre-- sponding to one tooth of sector ARI, AR2, etc., or an angular distance equal to the spacing of stopping members SI, S2, etc. The movement of cam toothed sectors 96 is effective to move the lever member 91 shown in Figs. 2, 3, 4, 5 and 6 in the path of an arm 98 best seen in Fig. 6 carried by the speed governor shaft 99 for momentarily arresting the movement of shaft 51 for a purpose that will be hereinafter described in detail.

The angular movement of gear sector 90 formed with arm 9| to which the bar 92 is secured as imparted through the engagement of any one of the pawl portions 95 with their respectively associated ratchet toothed arms ARI, AR2,

-etc., is effective to rotate the pinions I and IN,

Fig. 5, keyed on a spindle I02, in turn pivoted in a bushing I03 carried by the plate 2I. The movement of pinion I00 and gear IOI on spindle I02 is effective to tension a spiral retractile spring :"202 and the spring pressed pawl .203 shown in Figs. 3 and engages a ratchet wheel 204 secured tothe underside of gear IOI for holding the ratchet-toothed arms ARI, AR2, etc. in each. advanced position. The gear IOI meshes with a gear I04 loosely mounted on the upper disposed end of a cam shaft I05 but imparts a rotary movement to this shaft through a spring I06 having one of its ends hooked to a post I0I carried by the gear I04 and its other end to a post I08 upwardly extending from the'free end of a lever member I09 keyed on the cam shaft I05, the

movement of gear I04 with respect to lever memher I 09 being limited by the length of an arcuated slot H0 in the gear I 04 and the gear ratio from gear sector 90, gears I00 and IOI and gear I04 is such as to impart one-seventh of a turn to cam shaft I05 for each tooth of sectors ARI, AR2, etc.

Cam shaft I05 cooperates with a cam shaft III for operating the arms YI, Y2, Y3, etc. in their proper sequence for releasing the arms AI and A2 of each set as will be hereinafter described in detail.

The cam shaft III is journaled at its upper end in the plate 2| and at its lower end in a bearing portion formed with the plate 34 and is held against axial movement therein by a collar II2 shown in Figs. 2 and 5. On the lower end of shaft III is keyed a bevel gear II3 meshing with a larger gear II4 keyed on a shaft or spindle II5. This shaft is journaled at one end in upright II and at itsother end in the vertical portion VP of plate 34. On shaft H5 is keyed a ratchet wheel II6 shown in Figs. 2, 4 and 5 disposed in operative relation with an actuating pawl I I1 shown in Figs. 2 and 5 pivotally mounted at the free end of an arm II8 formed integrally with the bar 31. The pawl III is formed with an extension II9 normally abutting against the base 9 for preventing its engagement with the ratchet wheel II6 when the bar 31 is in normal position as shown in Fig. 2, and a spring pressed retaining pawl I is provided for holding the cam shaft III in each advanced position against the tension of a retractile spring I2I shown in Fig. '5 coiled on shaft II5. According to this construction the operation of any one of the key members KI, K2. etc., and consequently the operation of bar 31 is effective to actuate the ratchet wheel II6 one tooth for successively preparing the release of arms AI and A2 of each pair by imparting a small pivotal movement to yokes YI, Y2, Y3, etc. for a purpose that will be hereinafter described in detail, the ratio of gears H4 and II3.being such as to impart a complete turn to cam shaft III in seven steps of ratchet wheel II 6.

On the lower end of shaft 51 is keyed a gear I30, shown in Figs. 2, 3, 4, 5 and 6, operatively engaging a pinion I3I mounted on a spindle I 32. This spindle is journaled at one end in the bracket I33 secured on plate I34 and its other end in a bearing portion formed with the plate I 34. On the lower end of spindle I32 is securely mounted a Wheel I35 of insulating material having two diametrically opposite cam portions provided for opening the normally closed impulse springs I36 and I3! shown in Fig. 5 mounted in a pile-up arrangement on the underside of plate- I34.

The movement of shaft 51 and the pulsing cam I35 actuated thereby iscontrolled by a speed gov-,

ernor SG shown in Figs. 2 and 6 having its shaft 99 formed with a worm portion I38 engaging the worm gear I39 keyed on the spindle I32. The gear I30- keyed on the lower end of shaft 51 is provided with a plurality of studs I40 of insulating material provided for closing normally open or strip such as I 44 shown in Figs. 2, 4 and 6,

having slots I45 for permitting the axial movement of these bars as imparted by the movement of the pivoted plate I46, through the engagement of camming portions CP with the arms I4I of angle levers I48 shown in Figs. 2 and 4. Angle levers I48 are pivoted on lugs I49 extending from the top portion of bank 33 and the other ends of resetting strips I44 are loosely connected to links I50, in turn pivoted on similar lugs I5I secured to the lower edge of bank 33. The operation of the camming plate I46 is effected through the rotation of a pinion I52 shown in Figs. 3 and 5 keyed on the shaft I8 and engaging the gear toothed portion I53 formed with the camming plate I46. Pinion I52 is slidably mounted on shaft I8 and may be moved in disengaged relathrough theoperation of a pinion I55 disposed in aoea as operative relation with the rack portion I56 formed on the hub of pinion I52.

The pinion I55 is keyed at theend of a shaft I51 journaled on bearing portions I58 and I59 of plate 2| and on the opposite end of shaft I51 is keyed a lever member I60 shown in Figs. 2, 3 and 5 extending downwardly for connecting with a lever member I6I through the engagement of pin- I62 carried by lever I6I in the slot I63 of lever I60.

The lever I6I is pivotally mounted on a shoulder screw I64 engaging the top end of a bracket I65 shown in Figs. 3, 5 and 6, formed with the plate I34. The bearing portion of lever I6I is provided with a radially disposed slot I66 engaging the lug I61 at the end of a sleeve I68 and to the front end'of this sleeve is securely mounted a double armed lever member I69 shown in Figs. 1, 3 and 5,-provided at its ends with key buttons I10 and HI so that a movementof lever I6I as by a pressure applied on the key button "I is effective to rotate the pinion I55- for slidably moving the pinion I52 out of engagement from the gear sector I63 of camming plate I46.

According to this mechanism and considering the pinion I52 in disengaged relation from the gear sector I53, the operation of gear sector 82 is rendered ineffective to operate the camming plate I 46 and therefore ineffective to reset the stopping members SI, S2, etc. which may have been operated through the setting of the key members KI, K2, etc., thus permitting the successive operation of the pulsing mechanism as for signaling a given telephone number any number of times by a single setting operation of the key members KI, K2, etc., as will be hereinafter described in detail.

The camming plate I 46 is provided with an arm I12 shown in Figs. 3, 4 and 5, formed with an upward extending lug portion I13 disposed in en- 4 gageable relation with the free end of an arm I14 pivoted on'a spindle I15, and on the arm I14 is securely mounted a cam I16. The turning movement of this cam imparts-an upward movement to a rod I18 best seen in Fig. -2 for disengaging the retaining pawl I20 from ratchet wheel I16, thus controlling the resetting operation of cam shaft III so that the manual operation of lever arm 15 and thereby that of gear sector 82 and the shaft 18 is effective when the pinion I52 engages the gear sector I53 of camming plate I46 to disengage'the pawl I20 from ratchet wheel II6 to permit the return movement of camshaft III to normal under the tension of its resetting spring I2I, the cam shaft I05 being returned to normal unoperated position through the engagement of a cam portion 206 carried by shaft 18 and engaging the upward extending lug of retaining pawl 203 as shown in Figs. 3 and 5, each time the handle lever 15 is operated as to return the sets of arms AI and A2 to normal position after each operation of the transmitter.

The upright disposed bar 58 with which the laterally'extending supporting arms 56I 562, 563, 564, etc. are formed is provided with a bracket portion I80 shown in Figs. 2, 3, 5 and 6, for re-.

ceiving a shoulder screw I8I serving as pivot for a sleeve 82. On the front end portion of this sleeve is securely mounted a double armed lever '83 provided at its ends with key buttons I84 and I85 and the other end of sleeve I82 is formed Lever I81 is bent at right angles at its lower end and is provided with a slot I89 for engaging the end of lever 91 as shown in Figs. 2, 3, 5 and 6 for moving it against the tension of spring I92 in the path of arm 98 carried by the ,govemor shaft 99 upon the depression of key button I85 .for preventing the movement of the governor shaft and therefore that of the shaft 51 of the pulsing mechanism, the locking and unlocking of governor shaft 99 by key members I84 and I85 permitting the complete setting of the key nlem'- bers KI, K2, etc. prior to the sending operation of any call designation or starting the pulsing operation upon the setting of the first key KI, K2, etc.- of a'given telephone number to be signaled.

In a typical example of the operation of the transmitter, supposing that it is desired to transmit the call designation CH3-1009 and that the pulsing operation shall start upon the first key depressed; that is, the key member K2 inscribed with the designation letter C. The key button I84 which is in registry with the inscription release call on the front of casing I0 is first moved in that position as shown in Figs. 1, 2, 4 and 5. In that position the cam I8I permits the pivotal movement of lever 91 under the tension of spring I92 out of engaged relation from arm 98 carried by governor shaft 99.

The key K2 bearing the designation letter C, as above mentioned, is then depressed for actuating the bar B2 connected thereto through its yoke I4 and connecting links L2 and I8 shown in Figs. 2 and 7. 'The movement of bar B2 is transmitted to plunger P2, Fig. 6 against the tension of its retractingspring 32. The axial movement of plunger member P2 is effective to move the stopping member S2 of the lowermost disposed coordinate row in the path of arms AI and A2 associated with that coordinate row of stopping members.

The downward movement of key K2 actuates the bar 31 and thereby the cam shaft I II through the engagement of pawl II1 with ratchet wheel I I6 operating the angle gears H3 and H4. The first step of shaft III is effective to operate the lever arm YI shown in Figs. 5 and 16 for releasing the arm AI associated with the lowermost disposed coordinate row of stopping members SI, S2, etc. The movement of these arms AI and therefore that of A2 under the tension of their motor spring 59' and the engagement of pawl 54' carried by arm AI with the ratchet wheel R1 carried by shaft 51 is effective to rotate this shaft and the gear I carried thereby for actuating the pulsing spring I31 through pinion I3I, the movement of the pulsing cam I35 shown in Figs. 4 and 5 being controlled by the governorSG driven by the worm gear I39 engaging the worm portion I38 of governor shaft 99.

The angular movement of arms AI and A2 from the position shown in Fig. 6 to the position where arm A2 engages the stopping member $2, the arm A2 has moved a corresponding angular distance; that is, equal to twice the distance between two stopping members SI, and S2, thus rotating the shaft 51a corresponding angular distance and the pulsing cam I35 one turn for opening the contact springs I36 and I31 twice and thereby transmitting two pulses; The angular movement of shaft 51 is limited through the disengagement of pawl 54 from ratchet wheel R1 when the arm A2 engages the stopping member' S2 and the consequent flexing of spring 53 due to the movement of this arm relative to its associated arm AI, thusfcausing the pawl portion 95 to engage its associated ratchet sector AR6 for rotating it an angular distance corresponding to the angle formed by the normal position of arms AI and A2; that is,-an angular distance equal to the axial distance of any two stopping members such as SI and S2. The movement of'ratchet sector AR6 and therefore that of its camming sector portion 96, Figs. 3, 4, 5 and 6 is efiective to operate the lever 91 for momentarily stopping the governor shaft 99 and therefore the impulse cam I35 geared thereto to provide a lapse of time between each set of pulses for obtaining the so-called interdigit space. The movement of ratchet sector ARE and therefore that of its gear sector 90 is effective to rotate the gear I 04,. Figs. 2,3, 4 and 5 through pinion I and gear |0| for rotating the cam shaft I andtensioning the retractile spring 202. However, if key K4 bearing the designation letter H of the 'call designation CH3-1009 has not been depressed prior to the operation of gear I04, cam shaft I05 is prevented from turning through the cam C22, abutting against the'arm Y22 of yoke member Y2 as shown in Figs. '12 and 13 so that the movement of gear I04 results in tensioning the spring I06 and the arm AI of the second coordinate row of stopping members SI, S2, etc., is not released. The arms AI and A2 associated with the lowermost disposed coordinate row of stopping members SI, S2, etc. are now abutting against the stopping member S2.

As above described, the downward movement of key K2 and the bar actuated thereby actuates yoke ZI shown in Flgsf i, '1 and8 having one end connected to the lever 38 and its other end to the ratchet rack 40. In the downward movement of rack 40, the tooth T22 is brought in engaged relation with the pawl 45 of arcuated bar 3| so that the return movement of key K2 and there Similarly, the operation of key member K4 for transmitting a number of .pulses corresponding to the designation letter H is effective to operate the bar B4 and the spring retracted plunger member P4 for moving the stopping member S4 of second coordinate row of stopping members SI, S2, etc., in the path of levers AI and A2 of that row. The downward movement of this key and that of the cross bar 31 with the consequent operation of pawl H1 and ratchet wheel H0 is efiective to impart a turning movement or one step to camming shaft I I I. Prior to the second step of cam shaft III, as imparted by the operation of key member K4, however, it is to be remembered that the cam shaft I05 as above mentioned is held from turning under the tension of spring I00 by the arm Y22 abutting aga nst the stop afforded by the vertical portion of cam C22, the spring I06 having been tensioned by the movement of ratchet toothed sector ARB through the gear sector 90 carried thereby and pinion I00.

The second step of cam shaft III is effective to pivot the yoke Y2 for moving its arms Y2I and Y22 from the position indicated in Figs. 12 and 13 to the position shown in Fig. 14 for permitting I under the tension of spring I05 the movement of shown in Fig. 14 to the position shown in Fig. 15 where the armY23 of yoke Y2 is moved clear of arm Al for permitting its movement and that of its cooperating arm A2 under the tension of their associated motor spring 59 The operation of arms AI and A2 and their associated pawl 54 engaging the ratchet wheel R5 is effective to actuate the shaft 51 and the impulse cam I35 two turns, thus opening the contacts I36 and I31 four times for transmitting the number of pulses corresponding to key K4. The downward movement of key K4, like in the operation of key K2, through the operation of arm 38 and yoke ZI, is eflective to move the ratchet toothed rack 40 downwardly so that the tooth T23 of this rack engages the slidable pawl 45 for moving the arcuated' bar 3| and the spring pressed plungers PI, P2, etc. carried thereby in axial relation with the third coordinate row of stopping members SI, S2, etc. where the axiallymovable pawl 41 carried by the bar 3| engages the tooth T3 of stationary rack 44 for holding the bar 3| in that position and the plunger members PI, P2, P3, etc. carried thereby in axial relation with the stopping members SI, S2, S3, etc. of the third coordinate row.

The engagement of arm A2 and subsequently that of thearm AI with the stopping member S4 of the second coordinate row of stopping members SI, S2, etc., like in the signaling of the designation C by the depression of key K2, the movement ofarms AI and A2 relative to each other is efiective to tension their associated spring 53 for disengaging the pawl 54 from ratchet wheel R6 and engaging its pawl portion 95, with ratchet toothed sector AR5 for rotating it and thereby its camming portion 96 for stopping the p ilsing mechanism simultaneously with the movement of gear I04 for actuating the cam shaft I05 through the normal tension of spring I06. However, if the key K3 bearing the designation number 3 has not been depressed, the spring I05 is tensioned through the movement of gear. I04 but the cam shaft I05 is not operated due to the cam C33 being prevented from turning by the yoke Y3 in the manner described in connection with the operation of key K2. The arms AI and A2 remain in abutment against the -stopping member S4 of the second coordinate row of stopping n embers SI, S2, S3, etc., stopping member S4 having been positioned by the operation of key K4, bearing the designation letter H, the second digit of the call designation to be transmitted. The operation of the transmitter is identical to that effected by the depression of the keys K2 and K4 for each successive key depressed which may comprise a call designation to be transmitted.

The operation of cam shafts I I and I05 for the operation of yoke members YI Y2, Y3, Y4, Y5, Y5

and Y1 and thereby the release of their respectively associated pair of arms AI and A2 has been described in connection with a condition in which each set of pulses is completely transmitted before the next key is depressed. However, in case key members representing a seven digit call designation are depressed in a shorter lapse of time than that required for the transmittin of one digit at the rate of ten pulses per second, as controlled by the governor device S. G. the operation of cam shaft III imparted by the movement of the key members is effective to move the yokes YI, Y2, Y3,

' etc. successively from the position shown in Figs.

12 and 13 to the position shown In Fig. 14, wherein the movement of cam shaft I05 as above described will successively move these yoke members v to the position shown in Fig. 15 for successively releasing their respectively associated arms AI and A2 at the end of each preceding pulsing operation.

At the completion of the complete call transmitting operation as CH3-1009, the arms AI and A2 associated with the ratchet wheel R'I abut against the stopping member S2 of the lowermost disposed coordinate row.

The arms AI and A2 associated with ratchet wheel R6 abut against the stopping member 54 of the second coordinate row in an ascending direction.

The arms AI and A2 associated with ratchet wheel R5 abut against the stopping member '83 of the third coordinate row.

The arms AI and A2 associated with ratchet wheel R4 abut against the stopping member-SI of the fourth coordinate row.

The arms AI and A2 associated with ratchet wheel R3 abut against the stopping member SIO of the fifth coordinate'row.

The arms AI and A2 associated with ratchet wheel R2 abut against the stopping member SIO of the sixth coordinate row.

The arm AI associated with ratchet wheel RI abut against the stopping member S9 of the seventh coordinate row.

Theexample of operation of the call transmitter of the invention has been described with the key I84 moved in release call position as shown in Figs. 1, 2, 3, 4, 5 and 6; that is, with lever I81 in position inefiective with respect to arm 91, thus permitting the operation of the impulse mechanism immediately upon the operation of the first digit key depressed. However, whenever it is desired to prevent the starting operation of the transmitter'immediately after the operation of the firstkey which may represent the first digit of a call designation to be transmitted, the pivotal movement of cam I86 by a pressure applied on the key button I85 is eifective to move the lever member 91 in the path of arm 98 carried by governor shaft 99, thus preventing the operation of the transmitter until the governor shaft is released by a pressure applied on the key button I84 in the manner above described. I

Arms AI and A2 of the camming shafts II I and I05 are returned to normal unoperated position shown in Figs. 5 and 6 by the operation of handle lever I5. The downward movement of this handle lever and therefore the rotary movement of gear sector 82 actuated thereby is effective to rotate the shaft. I8 through the movement of gear 8], the movement of shaft I8 being eifective to tension the retractile spring 88 and to impart an angular movement to the bar I shown in Figs. 5, 6 and 16 in a counter-clockwise direction concentric to shaft 51 through the operation of gears 11 and 68.

The movement of bar I0 from its normal unoperated position to its operated position shown in .dotted lines in Figs. 3 and 6 is eifective to en- I gage the lugs I6, I6 I6 I6 16 I6 and I6 formed with the arms AI of each pair for moving the arms Al to normal unoperated position shown in Figs 2, 5 and 6, where the arms of yokes YI, Y2, Y3, Y4, etc. reengage the arms Al for 'holding them against the action of their motor springs 59', 59", 59 etc., which have been t'ensioned upon the return of the arms AI and A2 to normal. v z l Themo'vement of'shaft I8 imparted by the movement of gear sector 82 is effective to rotate the camming plate, I46 through its gear rack .por-

S8 and S9, which have been operated by the' movement of the key members bearing the ordinals or digits of the call designation transmitted, that is, CH3-l009. to normal unoperated position as shown in Figs. 4, 5 and 6.

Upon the pivotal" movement of camming plate I46, the upward extending lug I13 carried thereby and shown in Figs. 2, 3, 4 and 5 engages the arm formed with the disc member I I4 for retating the cam "6, thus imparting an upward movement to the rod. I'II for disengaging the pawl I 20 from ratchet wheel H6 and thereby permitting the cam shaft III to return to normal unoperated position through thetension of its retractile spring I2I, such return movement being limited by a pin 200 carried by gear I I4 engaging a stop 20I carried by the upright VP of plate 34.

The movement of camming plate I46 simultaneously disengages pawl 203 from ratchet wheel 204 for permitting the ratchet toothed sectors ARI,-;AR2, etc. carried by bar 92 and the cam shaft I05 actuated thereby to return to normal unoperated position under the tension of retractile spiral spring 202. The return movement of lever arm I5 and the camming plate I46 to normal unoperated position is effected by the tension of retractile spring 88 and the transmitter is now ready for a subsequent call transmitting operation by depressing the key members KI, K2, K3, etc. according to the telephone number to be transmitted.

Supposing now that the telephone line having the call designation CH31009 above described was busy and that it is desired to repeat such a call. The key III shown in Figs. 1, 3 and 5 is depressed. The operation of this key moves the sition shown in Figs. 3, 5 and 6, thus turning the shaft I51 and the pinion I55 carried thereby for moving the pinion I52 'out of engagement from gear toothed sector I53 of plate I46. The downward movement of handle lever I5 and that of gear sector 82 actuated thereby actuate a gear 8| and the shaft I8 and wind the retractile spring 88. The movement of shaft I8 acfuates the gear sector 11 and thereby thegear 68 for rotating the bar for returning the arms AI and A2 to their starting position shown in Figs.

5 and 6. The movement of shaft I8 a small angular distance from its maximum operated position is eflective to operate the pawl 203 for permitting the return movement of ratchet toothed sectors ARI, AR2, AR3, etc. and the cam shaft I05 to normal position under the tension of. retractilespring 206, the cams C22, C33, C44, etc. and the arms of yoke members YI, Y2, Y3, Y4, etc. are now in the position shown in Fig. 14. while the cam shaft III remains in its advanced or operated position due to the engagement of retaining pawl I20 with ratchet wheel I I6. Upon the resetting movement of arms AI and A2 of each set through the engagement of bar I0 with the lug I6 formed with the arms Al, the arms AI are moved relatively to their associated arms A2, causing the spring 53 to straighten for dislever arms I6I and I60 to the right of the poengaging the pawl portions 95 from the ratchet.

toothed sectors ARI, AR2, etc. and reengaging pawls 54', 54 54 etc. with their respectively associated ratchet wheels on shaft 51 for actuating this shaft according to the successive automatic release of arms Al and A2 as eilected by the operation of cam shaft I05 operated at the end of each digit pulsing operation determined by the location of stopping members corresponding to key members K2, K4, K3, Kl, Kill, Kill and K9 representing the telephone call designa tion CH3-1009 above mentioned.

According to this example of operation any call designation may be repeated any desired number of times by the simple operation of handle member 15 subsequent to the operation of key button ill to the repeat position indicated on the housing of the transmitter.

It is'obvious that minor changes may be made in the device of this invention without departing from the scope of the appended claims.

What is claimed is:

1. In a call transmitter, a unidirectional movable shaft, a pulsing mechanism operatively connected to said shaft for movement in said direction, a movable member, a motor spring for actuating said member, operable means for normally holding said member against the tension of said spring, a row of operable stopping members, a set of keys for positioning said stopping members for limiting the movement of said movable member, and means actuated by each of said key members for actuating the first-mentioned means for releasing said operable member to cause the operation of said pulsing mechanism.

.2. In a call transmitter, a pulsing cam, a set of key members, a unidirectional movable shaft, a gearing mechanism operatively connecting said shaft to said cam, a plurality of motor means for actuating said shaft controlled by the operation of said key members and a governor mechanism for controlling the operation of each of said motor I means.

.- of key members representing digits, a plurality of spring driving mechanisms, a, shaft operatively associated with each of said mechanisr s, a gearing mechanism operatively connecting said shaft to said pulsing cam, means operated by the movement of said key members for causing the successive operation of said spring mechanisms, means operated by the movement of said key members for limiting the operation of said driving mechanism and manually operable means for resetting said driving mechanisms collectively.-

5. In a call transmitter, a pulsing mechanism,

a plurality of rotatable arms, a spring for actuating each of said arms, a row of normally ineflective stopping members for each of said arms, a plurality of means for normally holding said-arms in normal position against the tension of said springs and a set ofkeys for selectively operating said members and simultaneously operating said means to cause the operation of said arms sue cessively to pointsdetermined-by the position of said members in said rows for actuating said mechanism. 4

6. In a call transmitter, a pulsing cam, a set of numbered key members representing digits, a rotatable shaft, a gearing mechanism operatively connecting said shaft to said pulsing cam, a plurality of rotatable arms, a plurality of springs for actuating said arms, a lever member for normally holding each of said arms in starting position against the tension of said springs, a plurality of means operatively and independently connecting said arms to said shaft, means set by the operation of said key members for determining the extent of movement of said arms, and means actuated by the movement of said key members for successively operating said lever members for releasing said arms according to the order of operation of said key members for imparting a succession oi! movements to said shaft according to the position of the operated key members.

7. In a call transmitter, a pulsing cam, a set of key members representing digits, a rotatable shaft operatively connected to said pulsing cam, a plurality of pivoted arms, a, motor spring for actuating each of said arms and means positioned by the operation of said key members for limiting the pivotal movement of each of said arms according to the digit represented by said key members, and a plurality of unidirectional means operatively connecting said arms to said shaft.

8. In a call transmitter, a plurality of rotatable arms, a plurality of stopping members arranged in coordinate rows, a set of manually op" erable key members for moving said stopping members in the path of said arms and a pulsing mechanism operable successively in one direction according to the combined movement of said arms.

9. In a call transmitter, a plurality of movable arms, a plurality of stopping members arranged in coordinate rows, one coordinate row for each of said arms, a set of manually operable key members representing digitsfor moving said stopping members in the path of said arms, a pulsing mechanism actuated by the movement of said arms, and means manually operable for returning said stopping members and said arms to normal after each call transmitting operation of said mechanism.

10. In a call transmitter, a pulsing mechanism, a plurality of rotatable arms, a motor spring for actuating each of said arms, a set of normally ineffective stopping members for each of said arms arranged in rows, a set of keys representing digits operable to render said member effective with respect to said arms, a plurality of operable means normally holding said arms in a starting position .underthe tension of said springs and a common mechanism operable upon the operation of said keys for successively releasing said arms for actuating said impulse mechanism, and manually operable means for returning. said arms to normal position and simultaneously resetting said stopping members.

11. In a call transmitter, a pulsing mechanism, a plurality of pivoted'arnis, an arcuated row of stopping members associated with each of said arms but normally in'efiective therewith, a. set of keys, a plurality of plunger members actuated by the movement of said keys in one direction, a support for said plunger'members, a step-by-step operating mechanism operable upon the movement of each of said keysin the other direction for successively moving said support for positioning said plunger members with respect to said stopping members and a mechanism operable upon the successive operation of said keys for releasing said arms for successively actuating said impulse mechanism according to the order of operation of said keys.

12. In a call transmitter, a plurality of motor, means, a shaft actuated by the operation of said motor means. a set of key members, a plurality of rows of equally spaced stopping members actuated by the operation of said key members for controlling the operationof said motor means, a resetting bar for each row of said stopping members, a camming plate common to all of said bars, a handle, a gearing mechanism operatively connecting said plate to said handle, and other means actuated by the operation of said handle for returning said motor means to normal unoperated position upon the operation of said camming plate.

13. In a call transmitter, a plurality of movable arms, a motor spring for actuating each of said arms, operable means for holding said arms in starting position against the tension of said springs, an arcuated row of stopping members for each of said arms, a set of manually operable key members representing digits for positioning a stopping member in each row in the path of said arms at points determined by the digits inscribed on said key members, means actuated by the operation of said key members for con-- trolling the release of said arms, and a pulsing mechanism actuated by said arms according to the sequence of operation of said key members.

14. In a call transmitter, a plurality of movable arms, a pawl carried by each of said arms, a plurality of stopping members arranged in rows, one row for each of said arms, a shaft, a plurality of ratchet wheels carried by said shaft and normally engaged by said pawls, a motor spring for each of said arms, means for normally holding said arms in starting position, a set of key members for moving said stopping members in the path of said arms, and simultaneously releasing said arms for actuating said shaft, a pulsing mechanism actuated by the ,operation of said shaft following the successive operation of said key members, and a governor device for controlling the operation of said mechanism.

15. In a call transmitter, a plurality of pivoted arms, a plurality oi stopping members arranged in coordinate rows, one arm for each of said coordinate, rows, a supporting bar, a plurality of plunger members carried by said supporting bar disposed in engageable relation with one of the coordinate rows of said stopping members, a set of key members, a ratchet mechanism actuated by the movement of said key-member's for successively moving said supporting bar for positioning said plunger members in operative relation with the said stopping members in each ordinate row, and means actuated by each of said key members for operating one of said plunger members to move one of said stopping members in position effective with respect to one of said arms, a pulsing mechanism actuated by said arms, and a manually operable mechanism for returning said stopping members and said bar in normal unop ,erated position after each'cail transmitting operationof said pulsing mechanism.

. 16. In-a call ttter, a pulsing cam, a shaft operatively connected to said cam, a plurality of independently operating motor meanssenting digits, camming means operated by said key members for successively actuating said operable means for causing the operation of said motor means, and stopping members actuated 'by the operation of said key members for controlling the operation of each of saidmotor means for sending a plurality of series of pulses according to the digits of the operated key members. 17. In a call transmitter, a pulsing cam, a rotatable shaft, a'gearing mechanism operatively connecting said shaft to said cam, a set of pivoted key members numbered to represent ten digits,

a plurality of actuating mechanisms for said shaft, each of said mechanisms'comprising a pivoted arm, a motor spring connected to said arm, a ratchet wheel secured to said shaft, and a pawl carried by said arm engaging said ratchet wheel, a plurality of operable means for holding each of said arms in normal starting position against the tension of said motor springs, an arcuate support, a plurality of stopping members for said arms mounted for sliding movement in radial direction in said support and arranged in superposed rows concentric to the pivotal axis of said arms and said shaft but normally inefiective with respect to said arms, means operably connected to each of said key members for moving said stopping members in position eiiective with respect to said arms, a cam shaft operatively associated with said operable means, and a step-bystep operating mechanism responsive to the operation of any one of said key members for actuating said cam shaft for releasing said arms consecutively to cause the successive operation of said pulsing cam according to the digits and the sequence of the key members operated.

18. In a call transmitter, a pulsing cam, a shaft operatively connected to said cam, a plurality of motor means for actuating said shaft, means for normally preventing the operation of said motor means, a set of normally operated key members, means operated by the movement of said key members for effecting the release of one of said motor means and preparing the release of the other of said motor means, means actuated by the successive release of said motor means for successively releasing the other .of said motor means, and a governor device geared to said shaft for controlling the operation of said impulse cam.

19. In a call transmitter, a pulsing cam, a shaft operatively connected to said cam, a plurality of independently operating motor means for successively actuating said shaft, a governor device for controlling the operation of said shaft, and means actuated by the operation of a number of said motor means to cause an interval of time between each set of pulses greater than the interval of time between each of said pulses as determined by the operation of said governor device.

20. In a call transmitter, a pulsing cam, a plurality of motor means for actuating said cam, manually operable key members, means actuated by the'setting of said key members for causing the operation of said motor means successively, a governor device for controlling the operation of said impulse cam, another manually operable means for returning said motor means to normal starting position, and means operating automatically for causing the successive operation of said motor means for repeating the series of pulses as determined by the setting of said key members, the operation of said automatically operable means being effective to control the starting operation of said motor means.

21. In a call transmitter, a plurality of pivoted arms arranged in pairs, the arms in each pair being movable relative to each other, a motor spring for each pair of said arms, a-pawl carried by one of said arms in each pair, a spring carried by each of said pawls and engaging the other arm of the pairs for holding them in angular spaced re- 'iation with respect to the first-mentioned arms,

an arcuated row of stopping members operatively pair for successively effecting the complete release of the other pairs of arms and a. pulsing mechanism actuated by the operation of each pair of said arms according to the set position of said stopping members. I

' 22. In a call transmitter, a base, a mounting plate carried by saidbase, an upright member secured'to said plate and having a plurality of supporting arms extending substantially at rightangles therefrom, a bearing portion at the end of each of said supporting arms, a plurality of arms each having a hub portion rotatably mounted in the bearing portions of said supporting arms, and other arms pivoted-on the bearing portions of the first-mentioned arms and capable of relative movement with respect to the secondmentioned arms, a shaft pivoted in ,said base and in said plate and disposed concentric to the hub portions of said supporting arms and the first and second-mentioned arms, means carried by each of the second-mentioned arms for opera tively engaging said shaft for rotating it, a pulsing mechanism actuated by the movement of said shaft, and means controlled by the movement of one of the second-mentioned arms relative to the movement of one of the last-mentioned arms for successively and momentarily preventing the operation of said shaft. V

23. In a call transmitter, a pulsing cam, a shaft operatively connected to said cam, a plurality of independently operable motor means for actuating said shaft, pivoted yoke members normally preventing the operation of said motor means, a set of operable key members, a plurality of means positioned by the operation of said key members for controlling the extent of movement of said ineffective with respect to said arms, a movable supporting bar, a set of plunger members carried by said supporting bar, a set of key members operatively associated with said plunger members, means actuated by the movement of said key members for operating said supporting bar for successively positioning said plunger members in operative relation with the stopping members in each ordinate row, means for independently holding said arms from movement against the tension of said motor springs, a camming mechanism controlled by the movement of said key members for successively releasing said arms, and a pulsing mechanism actuated by the operation of said arms as determined by the operation of said key members.

25. In a call transmitter, a pulsing cam, a rotatable shaft, a gearing mechanism operatively connecting said pulsing cam to said shaft, a set of key members representing digits, a plurality of actuating mechanisms for actuating said shaft, each of said mechanisms comprising a pivoted arm, aratchetwheel carried by said shaft, and a spring pressed pawl carried by said arm and engaging said ratchet wheel, and a plurality of stopping members set by the operation of said key members for controlling the movement of each of said mechanisms, means for resetting said driving mechanism and means for resetting said stopping members.

26. In a call transmitter, a pulsing cam, a rotatable shaft, a gearing mechanism operatively connecting said shaft to said cam, a set of key members having numerals thereon representing digits, a plurality of actuating mechanisms for operating said shaft, each of said mechanisms comprising a pivoted arm, a spring for actuating said arm, a ratchet wheel secured to said shaft,

- and a pawl carried by said arm and engaging said motor means, a cam shaft, a ratchet mechanism actuated by the successive operation of said key members for effecting the complete release of one of said motor means for actuating said pulsing cam upon the operation of the first key member in a call designation to be transmitted and preparing the release of the other of said motor means upon the successive operation of the other of said key members, another cam shaft, a ratchet mechanism actuated by the movement of the first operating motor, means for causing the operation of the last-mentioned cam shaft for causing the successive operation of each of said motor means succeeding the continued operation of said key members. i

24. In a call transmitter, a plurality of stop ratchet wheel, a plurality of stopping members for said arms arranged in superposed arcuated rows concentric to the pivotal axis of said arms and said shaft, an arcuated bank for slidably supporting said stopping members, means actuated by the operation of said key members for moving said .stopping members in the path of said arms for controlling the operation ofsaid shaft for transmitting sets of pulses according to the digits of said key members, a handle and resetting means for said arms and said'stopping members operating simultaneously upon the operation of said handle, the .resetting of said arms being effective to tension said springs.

27. In a call transmitter, a plurality of motor I means, a shaft, a pulsing cam operatively connected to said shaft, a set of key members, a plurality of camming mechanisms, a ratchet mechanism actuated by the operation of said key members for actuating one of said camming mechanisms for effecting a partial release of said motor means, a plurality of rows of equally spaced stopping members, a plunger member associated with each of said rows, a supporting bar for said plunger members, a stepping mechanism actuated by the operation of each of said key members for moving said supporting bar one step for positioning said plunger members successively in operative relation with said stopping members in each successive row, a pivoted bar operatively connected to each of said key members for actuating each of said plungers in each consecutive position for determining the extent of movement of each of sadi motor means, a ratchet mechanism automatically operating for successively causing the operation of the other of said camaoeame E ming mechanism for efiecting the complete release of said motor means for actuating said shaft, a resetting mechanism for said last-mentioned cam shaft, a resetting mechanism for said supporting bar, a manually operable camming plate for resetting said stopping members, means actuated by said plate for resetting the first and 1 second mentzioned camming mechanism and other means actuated by said plate tor resetting said supporting bar.

28. In a call transmitter, a pulsing cam, a plurality or motor means, a set of key members, and means responsive to the successive movement of any number of said key members for causing the operation of a corresponding number of said motor means for actuating said cam.

29. In a call transmitter, a pulsing cam, a pluraiity of motor means, a set of operable key members, a shaft, a plurality of cams carried by said shaft corresponding to the number of said motor means, and a stepping mechanism responsive to the movement of any number of key members for actuating said cam shaft for causing the successive operation of 'a number oi. said motor means corresponding to the number of the operated key members.

30. In a call transmitter, a pulsing cam, a plurality of motor means, a set of key members and a plurality of camming mechanisms for causing the successive operation of a number of motor means corresponding to the number of the operated key members, one of said mechanisms being responsive to the movement or the key members and the other operating under control of each of said motor means. 4

31. A call transmitter-in which a set of keys controls an impulse mechanism to transmit a code of impulses according to the keys depressed, characterized in this, that the impulse mechanism is started in operation by the depression of the first digit key, and an auxiliary key is provided which when actuated prior to the digit keys prevents the impulse mechanism from functioning until such key is released.

32. A call transmitter, according to claim 31, characterized in this, that the auxiliary key when operated moves a lever into the path 0! an arm carried by the governor shaft.

JOHN G. ROBERTS. CHARLES D. RICHARD. 

